JPH0435930A - Cutting device of constituent material of tire - Google Patents

Abstract

PURPOSE:To cut a constituent materials of a tire precisely, reliably and in a fixed size, by a method wherein cutting is performed under a state where a tensile force is applied to the constituent material of the tire by lifting the constituent material of the tire upper than a conveying surface of a conveyor by a material supporting surface of an anvil. CONSTITUTION:An anvil 7 is prepared so that a waiting surface 34 becomes parallel with a conveying surface of a conveyor, positioned and fixed under a state where the anvil 7 does not come into contact with a constituent material 12 of a tire and a timing belt 11. Simultaneously with conveyance of a material a length is measured by a length counting sensor and when the conveyor 3 is stopped by conveying the constituent material 2 of the tire by a fixed length, tensile force is applied to the constituent material 2 of the tire by lifting up the constituent material 2 of the tire by a material supporting surface 24 by turning the anvil 7 rearward by 90 degrees by a rotary actuator 29. Then a driving lever 18 is turned by a rocking and driving cylinder 19, a material pressing finger 17 is lowered and the constituent material 2 of the tire is pressed against the material supporting surface 24 for fixing. Then a cutter 4 is lowered and inserted into a groove 35, the cutter 4 is slid in a widthwise direction of the material and the constituent material 2 of the tire to which the tensile force is applied is cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cutting device that cuts tire constituent materials, such as inner liners, to a fixed size on a conveyor that feeds them into a tire forming drum.

(Prior Art) Conventionally, as a cutting device for this type of tire constituent material IL,
There are the ones shown in Figures 7 and 8 (Special Publick Publication 1986-30).
(See Publication No. 096). This cutting device is guided by a feeding table 41 that can move in and out on a tire forming drum 40, a movable frame 42 disposed above the table 41, and a guide bar 43 fixed to the frame 42 to cut the material width. It consists of a cutter 44 etc. that can be moved in the direction. The table 41 is provided with a cutter groove 45 at the lower part of its conveying surface to form an anvil. Further, although the cutter 44 is a cutter type, a push cutter is also used.

(Problems to be Solved by the Invention) By the way, with the above-mentioned conventional device, when cutting weak tire constituent materials, there is a risk that the material transfer may be obstructed by the anvil, and the accuracy of length detection by the measuring sensor deteriorates. , there is a problem that variations occur in cutting to a fixed size.

Further, if the cutter is a push-cut type, there is a problem that the tire constituent material falls into the cutter groove 45, making it impossible to cut.

The present invention was made in view of the above-mentioned circumstances, and
The object thereof is to provide a cutting device for tire constituent materials that can accurately and reliably cut tire constituent materials to a fixed size and in which the material transfer is not obstructed by an anvil.

(Means for Solving the Problems) In the present invention, the following technical measures were taken in order to achieve the above object.

That is, the present invention provides a cutting device that cuts tire constituent material 2 to a fixed length in the width direction on a conveyor 3 that feeds the tire forming material 2 into a tire forming drum using a cutter 4 disposed above the conveyor 3. An anvil 7 is disposed below the transport surface ml of the conveyor 3 so that its material support surface 24 can move up and down, and the tire constituent material 2 is transported by the material support surface 24 of the anvil 7 from the transport surface of the conveyor 3. It is characterized by being able to be lifted upwards and cut while applying tension.

Furthermore, in the present invention, the anvil 7 is rotatably arranged and has a standby surface 34 located below the conveyor conveyance surface;
It is characterized by having a material support surface 24 that lifts up the tire constituent material 2 and applies tension to it.

(Function) According to the present invention, since the material support surface 24 of the anvil 7 is located below the conveyance surface of the conveyor 3 while the tire component material 2 is being conveyed, the anvil 7 is attached to the tire component material 2. There is no contact, material transfer is not obstructed, smooth transfer is possible, and sizing accuracy is improved. When cutting the tire component material 2, the material support surface 24 of the anvil 7 rises above the conveyor conveyance surface to lift the tire component material 2 and apply tension. Since the tire component material 2 is cut under tension, it is cut smoothly and smoothly, and there is no risk that the cut ends, that is, the cuts, will be separated by the tension of the tire component material 2 and rejoining will occur after cutting. do not have.

Furthermore, when the anvil 7 is rotated, the anvil 7 rotates in the transport direction of the tire constituent material 2 at the same time as the conveyor 3 is started after cutting the material, so that the cut ends of the tire constituent material are prevented from coming into close contact with each other.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 5 show a first embodiment of the present invention, in which a cutting device 1 includes a cutter 4 provided on a conveyor 3 for carrying tire constituent material 2, and a cutter 4 disposed on both sides of the cutter 4 in the conveying direction. It consists of material pressing and fixing means 5, 6, and an anvil 7 provided below the conveyor conveyance surface.

The conveyor 3 is attached to a material supply device frame (not shown), and consists of an intermediate narrow-width heald conveyor 3a (!:) directly below the cutter 4, a roller conveyor 3b on the upper i side, and a belt conveyor 3c on the downstream side. The intermediate narrow heald conveyor 3a is rotatably supported on a frame 8 adjacent to the upstream and downstream conveyors 3b and 3c. Pulleys 9 and 10 with timing gear parts
and three endless narrow timing belts 11 suspended between both pulleys 9 and 10, and the upper surface of the belts 11 is flush with the conveyance surface of the upstream and downstream conveyor 3b3c.

Both booths lJ of the intermediate narrow belt conveyor 3a
9 and 10 and between the top and bottom of the timing heald 11, the anvil 7 is rotatably provided at a predetermined angle with respect to the axes of the pulleys 9 and 10. Plate apron 1 between both pulleys 9 and 10
2.13 is disposed between the top and bottom of the timing heald 11 close to the upper side.

The material pressing and fixing means 5 and 6 are arranged parallel to the anvil 7 and on the upstream and downstream sides of the anvil 7 via suspension frames 14 and 15 fixed to the material feeder frame on both sides of the conveyor in the width direction. They are arranged symmetrically and have the same configuration. That is, the double press fixing means 5,
6, a swinging shaft 16 that is swingably supported between the suspension frames 14 and 15, a pressing finger 17 whose base end is fixed to the shaft 16, and a pressing finger 17 fixed to one end of the swinging shaft 16. the drive lever 18, the swing drive cylinder 19 attached to the suspension frame 14, the connecting hardware 20 fixed to the end of the piston rod 19a of the cylinder 19, and the connecting hardware 20.
The drive pin 22 is fixed to the drive lever 18 and fitted into the elongated hole 21 of the drive lever 18. The pressing finger 1
As shown in FIG. 5, the tip of 7 is finger-shaped with a cut-in groove 23, and is bent so that it becomes approximately parallel to the conveyor conveyance surface when the tip presses the tire constituent material 2. and has spring properties. Further, this finger 17 is provided corresponding to a material support surface 24 of an anvil 7, which will be described later, and its tip portion presses and fixes the tire constituent material 2 onto this material support surface 24.

The cutter 4 has the same structure as the conventional example, and is attached diagonally to a cutter holder 26 that is slidably attached to a guide bar 25 that is fixed to the suspension frame 14.15 in parallel to the swing shaft 16. , and can move in and out diagonally with respect to the cutter holder 26.

The anvil 7 has both end shaft portions 27 rotatably attached to the frame 8 of the conveyor 3a via bearings 28,
A rotary actuator 29 connected to one end of the shaft portion 27 allows the shaft portion 27 to be reciprocated by 90 degrees. The anvil 7 has a cutout groove 32.33 having an orthogonal groove bottom 30.31 that is parallel to the axis of the anvil 7 and forms an orthogonal plane including a tangent to the outer circumferential surface of the shaft portion 27. A standby surface 34 is provided at three locations corresponding to the groove 1, parallel to one groove bottom 30 and located slightly below the conveyor conveyance surface, and a standby surface 34 parallel to the groove bottom 31 and located above the conveyor conveyance surface. A material support surface 24 is formed over substantially the entire length. Furthermore, anvil 7
A cutter groove 35 is provided on the material support surface 24 of the material supporting surface 24 at the same angle as the inclination angle of the cutter 4 and inclined toward the downstream side in the material conveyance direction, and the lower end of the groove bottom of the cutter groove 35 is provided with the cutter groove 35 at the same angle as the inclination angle of the cutter 4 and inclined toward the downstream side in the material conveyance direction. The cutter 4 is located above the surface so that the tip of the cutter 4 does not come into contact with the timing bell eye 1.

Note that during the conveyance of the tire constituent material 2, the anvil 7 is positioned to stop so that the standby surface 34 is parallel to the conveyor conveyance surface, as shown in FIG. 29, and is rotated 90 degrees in the opposite direction to the conveyance direction, and is stopped and positioned at a point where the material support surface 24 lifts up the tire constituent material 2 and becomes parallel to the conveyance surface, as shown in FIG. After the material cutting is completed, the row reactor 29 rotates 90 degrees in the conveyance direction so that the standby surface 34 becomes parallel to the conveyor conveyance surface.

In the first embodiment, when feeding the tire component material 2 by a fixed length, first move the anvil 7 so that the standby surface 34 is parallel to the conveyor conveyance surface as shown in FIG. Position and fix the timing bell so that it does not touch eye 1.

At the same time as the material is conveyed, the length is measured by a measuring sensor (not shown), and when the conveyor 3 is stopped after conveying the tire component material 2 by a predetermined length, the anvil 7 is moved 90 degrees back by the row actuator 29. The material supporting surface 24 lifts the tire component material 2 to apply tension, and then the swing drive cylinder 19 rotates the drive lever 18 to move the material pressing finger 17 downward to lift the tire component material 2.
is pressed and fixed to the material support surface 24. Therefore, cutter 4
is lowered and inserted into the cutter groove 35, and the cutter 4 is slid in the width direction of the material to cut the tire constituent material 2 under tension. When the cutting is completed, the tension applied to the tire component material 2 causes the cut edge (cut) to
are opened to each other and re-adhesion is prevented.

Simultaneously with the start of conveyance of the tire component material 2, the anvil 7 is rotated forward by the low reactor 29, and the material is conveyed with the cut end open and without coming into close contact with the anvil 7, and the anvil 7 is placed on the waiting surface of the anvil 7. 34 is located below the conveyor conveyance surface and is stopped and fixed, so that the tire component material 2 is smoothly and accurately conveyed to a fixed size without interfering with the anvil 7. Then, the conveyor 3 is stopped again, the anvil 7 is operated as described above, and the cutting operation is repeated.

FIG. 5 shows the main parts of the second embodiment of the present invention, and the difference from the first embodiment is that when the anvil 7 moves up and down, the material support surface 24 moves up and down with respect to the conveyor transport surface. The other configuration is the same as the first embodiment. The material support surface 24 is always held parallel to the conveyor conveyance surface, and when the material is conveyed, it descends and is located below the conveyor conveyance surface, and when the material is cut, it rises to lift the tire constituent material 2 and apply tension. It is designed to be cut.

The present invention is not limited to the above embodiment, and for example, the cutter 4 can be of a push-cut type.

(Effects of the Invention) As described above, the present invention provides cutting in which the tire component material 2 is cut to a fixed size in the width direction on the conveyor 3 that feeds the tire forming material 2 into the tire forming drum by the cutter 4 disposed above the conveyor 3. In the apparatus, an anvil 7 is disposed directly below the cutter 4 and below the conveying surface of the conveyor 3 so that its material support surface 24 can move up and down, and the tire constituent material 2 is placed on the material support surface 24 of the anvil 7. The tire component material 2 can be cut smoothly and reliably, and more precisely, because it can be cut while being lifted above the conveyance surface of the conveyor 3 and under tension. Since the material support surface 24 of the anvil 7 does not come into contact with the tire component material 2 when transporting the tire component material 2, the transport of even weak materials is not hindered by the anvil 7, thus ensuring sizing accuracy. Furthermore, since the tire is cut under tension, it is possible to prevent the cut end from opening immediately after cutting and rejoining the cut end. It is possible to prevent the cutter from falling into the cutter groove 35 and becoming unable to cut.

In addition, by rotating the anvil 7 and moving the material support surface 24 up and down, the cut tire component material 2 can be transported forward by the anvil 7, which prevents the cut ends from coming into close contact again and from forming wrinkles. Accuracy can be improved.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a partially cutaway side view, FIG. 2 is a partially omitted plan view, and FIG. 3 is a plan view of the conveyor and anvil. FIG. 4 is a sectional view showing the state of the anvil during material transport, FIG. 5 is an enlarged view of the bottom of the pressing finger, FIG. 6 is a longitudinal sectional side view showing the main parts of the second embodiment of the present invention, and FIG. 7 8 is a plan view of the conventional example, and FIG. 8 is an enlarged partially broken side view of the same. 1... Cutting device, 2... Tire constituent material, 3...
Transfer conveyor, 4... cutter, 7... anvil,
24... Material support surface, 34... Standby surface, 35...
cutter groove.

Claims (3)

[Claims] (1) A cutting device that cuts tire constituent materials (2) to a fixed size in the width direction on a conveyor (3) that feeds the tire forming drum into a tire forming drum using a cutter (4) disposed above the conveyor (3), Immediately below the cutter (4) and below the conveying surface of the conveyor (3), an anvil (7) is placed on its material support surface (2).
4) is arranged to be movable up and down, and the tire constituent material (2) is conveyed by the material support surface (24) of the anvil (7).
3) A cutting device for tire constituent materials, characterized in that it is capable of cutting while lifting it above the conveying surface and applying tension. (2) The anvil (7) is rotatably arranged and has a standby surface (34) located below the conveyor conveyance surface, and a material support surface (24) that lifts the tire constituent material (2) and applies tension. ) The cutting device for tire constituent materials according to claim 1, further comprising: a cutting device for cutting tire constituent materials. (3) The device for cutting tire constituent materials according to claim 1 or 2, wherein the material support surface (24) of the anvil (7) is provided with a cutter groove (35).